Powerline Email Tools

Run every email-authentication check on a domain (SPF, DKIM, DMARC, MX, MTA-STS, TLS-RPT, BIMI, plus domain and mail-server blacklists) and return a score out of 100, per-check findings and a prioritized fix list. Use this first when asked whether a domain is set up correctly to send email.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used."
    },
    "dkim_selector": {
      "type": "string",
      "description": "DKIM selector (the s= value from a DKIM-Signature header). Optional; common selectors are tried when omitted."
    }
  },
  "required": [
    "domain"
  ],
  "additionalProperties": false
}

Look up and validate a single email DNS record for a domain, explaining each tag. record is one of spf, dmarc, dkim, bimi, mta-sts, tls-rpt, mx. SPF counts the 10-lookup limit; DMARC checks policy, reporting and external report authorization; DKIM sizes the key; MTA-STS fetches the policy file and compares it with the MX hosts; BIMI checks the logo (SVG Tiny PS) and mark certificate.

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain name, e.g. example.com. URLs and email addresses are accepted; the domain part is used."
    },
    "record": {
      "type": "string",
      "enum": [
        "spf",
        "dmarc",
        "dkim",
        "bimi",
        "mta-sts",
        "tls-rpt",
        "mx"
      ]
    },
    "selector": {
      "type": "string",
      "description": "DKIM or BIMI selector. Optional."
    },
    "policy": {
      "type": "string",
      "description": "MTA-STS only: policy file text to check instead of fetching it. Optional."
    }
  },
  "required": [
    "domain",
    "record"
  ],
  "additionalProperties": false
}

Check an IPv4 address against about 18 IP blacklists (SpamCop, Barracuda, UCEPROTECT, PSBL, Mailspike, ...) or a domain against domain blacklists. Each list is verified with its test entries first, so lists that refuse public resolvers (such as Spamhaus) are reported as unavailable rather than clean.

{
  "type": "object",
  "properties": {
    "target": {
      "type": "string",
      "description": "IPv4 address or domain."
    }
  },
  "required": [
    "target"
  ],
  "additionalProperties": false
}

Parse raw email headers: the Received delivery path with per-hop delays, the receiving server's SPF/DKIM/DMARC verdicts, DMARC alignment of the From domain, DKIM signatures, the sending IP, and bulk-sender requirements such as one-click unsubscribe.

{
  "type": "object",
  "properties": {
    "headers": {
      "type": "string",
      "description": "The raw header block (everything above the message body)."
    }
  },
  "required": [
    "headers"
  ],
  "additionalProperties": false
}

Scan an email subject and body (plain text or HTML) for spam-trigger phrases by category, ALL-CAPS, exclamation runs, emoji, URL shorteners and image-heavy HTML. Returns a low/medium/high risk reading and, optionally, a rule-based rewrite.

{
  "type": "object",
  "properties": {
    "subject": {
      "type": "string"
    },
    "body": {
      "type": "string",
      "description": "Plain text or HTML."
    },
    "rewrite": {
      "type": "boolean",
      "description": "Also return a calmer rewrite of the subject (and of a plain-text body)."
    }
  },
  "additionalProperties": false
}